package com.itheima.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.common.CustomException;
import com.itheima.reggie.dto.SetmealDto;
import com.itheima.reggie.entity.Setmeal;
import com.itheima.reggie.entity.SetmealDish;
import com.itheima.reggie.mapper.SetmealMapper;
import com.itheima.reggie.service.SetmealDishService;
import com.itheima.reggie.service.SetmealService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;
import java.util.stream.Collectors;

@Service
@Slf4j
public class SetmealServiceImpl extends ServiceImpl<SetmealMapper, Setmeal> implements SetmealService {
    @Autowired
    private SetmealDishService setmealDishService;

    /**
     * 新增套餐，同时需要保存套餐和菜品的关联关系
     *
     * @param setmealDto
     */
    @Override
    @Transactional
    public void saveWithDish(SetmealDto setmealDto) {
        //保存套餐的基本信息
        this.save(setmealDto);
      /*  //删除关联菜品信息
        LambdaQueryWrapper<SetmealDish> lqw = new LambdaQueryWrapper<>();
        lqw.in(SetmealDish::getSetmealId, setmealDto.getId());
        setmealDishService.remove(lqw);*/


        List<SetmealDish> setmealDishes = setmealDto.getSetmealDishes();
        //保存套餐和菜品的关联信息
        setmealDishes.stream().map((item) -> {
            item.setSetmealId(setmealDto.getId());
            return item;
        }).collect(Collectors.toList());
        setmealDishService.saveBatch(setmealDishes);

    }

    /**
     * 删除套餐，同时删除套餐和菜品的关联
     *
     * @param ids
     */
    @Override
    public void removeWithDish(List<Long> ids) {
        LambdaQueryWrapper<Setmeal> lqw = new LambdaQueryWrapper();
        lqw.in(Setmeal::getId, ids);
        lqw.eq(Setmeal::getStatus, 1);
        int count = this.count(lqw);
        if (count > 0) {
            throw new CustomException("套餐正在售卖中，不能删除~");
        }
        //删除操作
        this.removeByIds(ids);
        //删除关联数据
        LambdaQueryWrapper<SetmealDish> lqw1 = new LambdaQueryWrapper<>();
        lqw1.in(SetmealDish::getSetmealId, ids);
        setmealDishService.remove(lqw1);
    }

    @Override
    public SetmealDto getByIdWithSetmealDish(Long id) {
        //查询套餐信息
        SetmealDto setmealDto = new SetmealDto();
        Setmeal setmeal = this.getById(id);
        BeanUtils.copyProperties(setmeal,setmealDto);
        //查询套餐的菜品
        LambdaQueryWrapper<SetmealDish> lqw = new LambdaQueryWrapper();
        lqw.eq(SetmealDish::getSetmealId,id);
        List<SetmealDish> list = setmealDishService.list(lqw);
        setmealDto.setSetmealDishes(list);
        return setmealDto;
    }

    @Override
    public void updateWithDish(SetmealDto setmealDto) {
        //保存套餐的基本信息
        this.updateById(setmealDto);
        //删除关联菜品信息
        LambdaQueryWrapper<SetmealDish> lqw = new LambdaQueryWrapper<>();
        lqw.in(SetmealDish::getSetmealId, setmealDto.getId());
        setmealDishService.remove(lqw);

        List<SetmealDish> setmealDishes = setmealDto.getSetmealDishes();
        //保存套餐和菜品的关联信息
        setmealDishes.stream().map((item) -> {
            item.setSetmealId(setmealDto.getId());
            return item;
        }).collect(Collectors.toList());
        setmealDishService.saveBatch(setmealDishes);
    }
}
